/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-tiling/rewnifrev2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:35:38,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:35:38,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:35:38,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:35:38,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:35:38,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:35:38,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:35:38,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:35:38,176 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:35:38,177 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:35:38,178 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:35:38,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:35:38,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:35:38,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:35:38,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:35:38,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:35:38,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:35:38,186 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:35:38,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:35:38,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:35:38,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:35:38,195 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:35:38,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:35:38,197 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:35:38,201 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:35:38,205 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 00:35:38,206 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 00:35:38,207 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 00:35:38,208 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 00:35:38,209 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 00:35:38,209 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 00:35:38,210 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 00:35:38,210 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 00:35:38,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:35:38,212 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:35:38,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:35:38,214 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:35:38,241 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:35:38,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:35:38,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:35:38,243 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:35:38,243 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:35:38,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:35:38,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:35:38,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:35:38,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:35:38,245 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:35:38,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:35:38,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:35:38,245 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:35:38,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:35:38,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:35:38,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:35:38,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:35:38,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:35:38,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:35:38,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:35:38,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:35:38,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:35:38,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:35:38,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:35:38,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:35:38,249 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:35:38,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:35:38,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:35:38,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:35:38,693 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:35:38,698 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:35:38,699 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/rewnifrev2.c [2020-12-23 00:35:38,773 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f191bd3dd/e07092b0b6584d22a3fc325ecbdace9a/FLAGcf8a16376 [2020-12-23 00:35:39,412 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:35:39,413 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-tiling/rewnifrev2.c [2020-12-23 00:35:39,423 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f191bd3dd/e07092b0b6584d22a3fc325ecbdace9a/FLAGcf8a16376 [2020-12-23 00:35:39,759 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/f191bd3dd/e07092b0b6584d22a3fc325ecbdace9a [2020-12-23 00:35:39,762 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:35:39,766 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:35:39,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:35:39,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:35:39,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:35:39,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:35:39" (1/1) ... [2020-12-23 00:35:39,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f27da12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:35:39, skipping insertion in model container [2020-12-23 00:35:39,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:35:39" (1/1) ... [2020-12-23 00:35:39,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:35:39,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:35:39,985 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-tiling/rewnifrev2.c[401,414] left hand side expression in assignment: lhs: VariableLHS[~SIZE~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHPLUS,IntegerLiteral[1],IdentifierExpression[~i~0,]]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:35:40,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:35:40,014 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:35:40,030 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-tiling/rewnifrev2.c[401,414] left hand side expression in assignment: lhs: VariableLHS[~SIZE~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],BinaryExpression[ARITHPLUS,IntegerLiteral[1],IdentifierExpression[~i~0,]]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:35:40,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:35:40,058 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:35:40,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:35:40 WrapperNode [2020-12-23 00:35:40,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:35:40,060 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:35:40,060 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:35:40,060 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:35:40,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:35:40" (1/1) ... [2020-12-23 00:35:40,079 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:35:40" (1/1) ... [2020-12-23 00:35:40,102 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:35:40,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:35:40,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:35:40,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:35:40,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:35:40" (1/1) ... [2020-12-23 00:35:40,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:35:40" (1/1) ... [2020-12-23 00:35:40,117 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:35:40" (1/1) ... [2020-12-23 00:35:40,117 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:35:40" (1/1) ... [2020-12-23 00:35:40,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:35:40" (1/1) ... [2020-12-23 00:35:40,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:35:40" (1/1) ... [2020-12-23 00:35:40,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:35:40" (1/1) ... [2020-12-23 00:35:40,131 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:35:40,132 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:35:40,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:35:40,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:35:40,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:35:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:35:40,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:35:40,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:35:40,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:35:40,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 00:35:40,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:35:40,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:35:40,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:35:40,531 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:35:40,531 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 00:35:40,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:35:40 BoogieIcfgContainer [2020-12-23 00:35:40,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:35:40,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:35:40,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:35:40,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:35:40,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:35:39" (1/3) ... [2020-12-23 00:35:40,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e52d40c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:35:40, skipping insertion in model container [2020-12-23 00:35:40,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:35:40" (2/3) ... [2020-12-23 00:35:40,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e52d40c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:35:40, skipping insertion in model container [2020-12-23 00:35:40,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:35:40" (3/3) ... [2020-12-23 00:35:40,544 INFO L111 eAbstractionObserver]: Analyzing ICFG rewnifrev2.c [2020-12-23 00:35:40,551 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:35:40,557 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:35:40,581 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:35:40,616 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:35:40,616 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:35:40,617 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:35:40,617 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:35:40,617 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:35:40,617 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:35:40,617 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:35:40,618 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:35:40,635 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-23 00:35:40,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 00:35:40,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:40,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:40,642 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:40,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:40,649 INFO L82 PathProgramCache]: Analyzing trace with hash 126991449, now seen corresponding path program 1 times [2020-12-23 00:35:40,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:40,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695247886] [2020-12-23 00:35:40,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:40,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695247886] [2020-12-23 00:35:40,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:35:40,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:35:40,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138555897] [2020-12-23 00:35:40,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:35:40,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:40,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:35:40,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:35:40,990 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2020-12-23 00:35:41,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:41,010 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2020-12-23 00:35:41,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:35:41,012 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-12-23 00:35:41,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:41,027 INFO L225 Difference]: With dead ends: 27 [2020-12-23 00:35:41,028 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 00:35:41,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:35:41,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 00:35:41,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-23 00:35:41,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-23 00:35:41,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-23 00:35:41,076 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-12-23 00:35:41,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:41,076 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-23 00:35:41,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:35:41,077 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-23 00:35:41,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 00:35:41,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:41,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:41,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 00:35:41,080 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:41,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:41,085 INFO L82 PathProgramCache]: Analyzing trace with hash 121450323, now seen corresponding path program 1 times [2020-12-23 00:35:41,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:41,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772085535] [2020-12-23 00:35:41,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:41,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772085535] [2020-12-23 00:35:41,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:35:41,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:35:41,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626184488] [2020-12-23 00:35:41,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:35:41,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:41,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:35:41,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:35:41,213 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2020-12-23 00:35:41,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:41,285 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-12-23 00:35:41,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:35:41,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-23 00:35:41,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:41,288 INFO L225 Difference]: With dead ends: 20 [2020-12-23 00:35:41,289 INFO L226 Difference]: Without dead ends: 13 [2020-12-23 00:35:41,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:35:41,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-23 00:35:41,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-23 00:35:41,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 00:35:41,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-12-23 00:35:41,300 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2020-12-23 00:35:41,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:41,301 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-12-23 00:35:41,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:35:41,302 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-12-23 00:35:41,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 00:35:41,303 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:41,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:41,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 00:35:41,305 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:41,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:41,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1899941007, now seen corresponding path program 1 times [2020-12-23 00:35:41,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:41,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986461700] [2020-12-23 00:35:41,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:41,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:41,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:41,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986461700] [2020-12-23 00:35:41,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:35:41,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 00:35:41,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154962216] [2020-12-23 00:35:41,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:35:41,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:41,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:35:41,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:35:41,657 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2020-12-23 00:35:41,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:41,885 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-12-23 00:35:41,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:35:41,886 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-23 00:35:41,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:41,887 INFO L225 Difference]: With dead ends: 19 [2020-12-23 00:35:41,887 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 00:35:41,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:35:41,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 00:35:41,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2020-12-23 00:35:41,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 00:35:41,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-23 00:35:41,894 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-12-23 00:35:41,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:41,894 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-23 00:35:41,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:35:41,894 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-23 00:35:41,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 00:35:41,895 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:41,895 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:41,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 00:35:41,896 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:41,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:41,896 INFO L82 PathProgramCache]: Analyzing trace with hash 604563239, now seen corresponding path program 1 times [2020-12-23 00:35:41,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:41,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922910731] [2020-12-23 00:35:41,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:42,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:42,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922910731] [2020-12-23 00:35:42,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434991602] [2020-12-23 00:35:42,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:42,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 00:35:42,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:42,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:42,304 INFO L348 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2020-12-23 00:35:42,305 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2020-12-23 00:35:42,308 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:42,319 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:42,321 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:42,321 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:29 [2020-12-23 00:35:42,797 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:42,807 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:35:42,820 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:35:42,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:42,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:42,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2020-12-23 00:35:42,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577078888] [2020-12-23 00:35:42,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:35:42,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:42,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:35:42,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:35:42,867 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 15 states. [2020-12-23 00:35:43,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:43,333 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-12-23 00:35:43,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:35:43,334 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2020-12-23 00:35:43,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:43,335 INFO L225 Difference]: With dead ends: 24 [2020-12-23 00:35:43,335 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 00:35:43,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:35:43,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 00:35:43,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2020-12-23 00:35:43,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 00:35:43,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-12-23 00:35:43,342 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2020-12-23 00:35:43,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:43,342 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-12-23 00:35:43,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:35:43,343 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-12-23 00:35:43,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 00:35:43,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:43,343 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:43,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:43,557 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:43,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:43,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1572614179, now seen corresponding path program 2 times [2020-12-23 00:35:43,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:43,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825207554] [2020-12-23 00:35:43,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:43,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:43,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825207554] [2020-12-23 00:35:43,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65755192] [2020-12-23 00:35:43,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:43,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:35:43,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:35:43,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:35:43,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:43,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:43,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:43,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-12-23 00:35:43,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679085367] [2020-12-23 00:35:43,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 00:35:43,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:43,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 00:35:43,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:35:43,881 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 11 states. [2020-12-23 00:35:43,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:43,971 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-12-23 00:35:43,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:35:43,972 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2020-12-23 00:35:43,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:43,973 INFO L225 Difference]: With dead ends: 38 [2020-12-23 00:35:43,973 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 00:35:43,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-12-23 00:35:43,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 00:35:43,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-12-23 00:35:43,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 00:35:43,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-23 00:35:43,980 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-12-23 00:35:43,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:43,981 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-23 00:35:43,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 00:35:43,981 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-23 00:35:43,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 00:35:43,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:43,982 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:44,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:44,197 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:44,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:44,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1704999301, now seen corresponding path program 3 times [2020-12-23 00:35:44,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:44,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203719378] [2020-12-23 00:35:44,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:44,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203719378] [2020-12-23 00:35:44,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464254387] [2020-12-23 00:35:44,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:44,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 00:35:44,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:35:44,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 00:35:44,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:44,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:44,539 INFO L348 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2020-12-23 00:35:44,539 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2020-12-23 00:35:44,541 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:44,550 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:44,551 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:44,551 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:31 [2020-12-23 00:35:44,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:44,736 INFO L348 Elim1Store]: treesize reduction 132, result has 51.6 percent of original size [2020-12-23 00:35:44,737 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 163 [2020-12-23 00:35:44,742 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:44,791 INFO L625 ElimStorePlain]: treesize reduction 81, result has 43.0 percent of original size [2020-12-23 00:35:44,798 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 00:35:44,798 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:61, output treesize:61 [2020-12-23 00:35:45,389 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:45,394 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:35:45,399 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:35:45,406 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 00:35:45,410 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:35:45,413 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-23 00:35:45,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:45,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:45,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2020-12-23 00:35:45,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133622525] [2020-12-23 00:35:45,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 00:35:45,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:45,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 00:35:45,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:35:45,456 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 22 states. [2020-12-23 00:35:47,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:47,106 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-12-23 00:35:47,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 00:35:47,107 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 20 [2020-12-23 00:35:47,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:47,108 INFO L225 Difference]: With dead ends: 47 [2020-12-23 00:35:47,109 INFO L226 Difference]: Without dead ends: 31 [2020-12-23 00:35:47,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=461, Invalid=1609, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 00:35:47,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-23 00:35:47,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-12-23 00:35:47,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 00:35:47,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-23 00:35:47,117 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2020-12-23 00:35:47,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:47,117 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-23 00:35:47,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 00:35:47,118 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-23 00:35:47,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 00:35:47,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:47,119 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:47,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:47,334 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:47,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:47,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1670835535, now seen corresponding path program 4 times [2020-12-23 00:35:47,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:47,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495234885] [2020-12-23 00:35:47,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:47,853 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:47,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495234885] [2020-12-23 00:35:47,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320239689] [2020-12-23 00:35:47,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:47,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:35:47,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:35:47,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 00:35:47,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:47,929 INFO L348 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2020-12-23 00:35:47,930 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2020-12-23 00:35:47,931 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:47,937 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:47,938 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:47,941 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:26 [2020-12-23 00:35:48,025 INFO L348 Elim1Store]: treesize reduction 152, result has 13.6 percent of original size [2020-12-23 00:35:48,025 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 48 [2020-12-23 00:35:48,028 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:48,041 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:48,042 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:48,043 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:40 [2020-12-23 00:35:48,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:48,165 INFO L348 Elim1Store]: treesize reduction 282, result has 11.3 percent of original size [2020-12-23 00:35:48,165 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 65 [2020-12-23 00:35:48,168 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:48,180 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:48,180 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:48,181 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:71, output treesize:57 [2020-12-23 00:35:48,709 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:48,712 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:35:48,717 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 00:35:48,721 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-23 00:35:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:48,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:48,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2020-12-23 00:35:48,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352319387] [2020-12-23 00:35:48,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 00:35:48,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:48,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 00:35:48,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2020-12-23 00:35:48,766 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 27 states. [2020-12-23 00:35:50,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:50,265 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-12-23 00:35:50,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 00:35:50,266 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2020-12-23 00:35:50,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:50,267 INFO L225 Difference]: With dead ends: 36 [2020-12-23 00:35:50,267 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 00:35:50,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=365, Invalid=1357, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 00:35:50,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 00:35:50,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-12-23 00:35:50,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 00:35:50,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-12-23 00:35:50,276 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26 [2020-12-23 00:35:50,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:50,276 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-12-23 00:35:50,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 00:35:50,277 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-12-23 00:35:50,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 00:35:50,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:50,278 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:50,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:50,494 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:50,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:50,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1047363067, now seen corresponding path program 5 times [2020-12-23 00:35:50,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:50,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619577988] [2020-12-23 00:35:50,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:50,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619577988] [2020-12-23 00:35:50,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709036500] [2020-12-23 00:35:50,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:50,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 00:35:50,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:35:50,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 00:35:50,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 32 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:50,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:50,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 15 [2020-12-23 00:35:50,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472912006] [2020-12-23 00:35:50,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 00:35:50,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:50,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 00:35:50,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2020-12-23 00:35:50,818 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 15 states. [2020-12-23 00:35:50,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:50,916 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-12-23 00:35:50,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 00:35:50,916 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-12-23 00:35:50,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:50,919 INFO L225 Difference]: With dead ends: 58 [2020-12-23 00:35:50,919 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 00:35:50,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2020-12-23 00:35:50,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 00:35:50,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-12-23 00:35:50,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 00:35:50,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-12-23 00:35:50,933 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-12-23 00:35:50,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:50,933 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-12-23 00:35:50,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 00:35:50,934 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-12-23 00:35:50,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 00:35:50,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:50,935 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:51,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:51,150 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:51,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:51,151 INFO L82 PathProgramCache]: Analyzing trace with hash -2041873501, now seen corresponding path program 6 times [2020-12-23 00:35:51,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:51,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841866083] [2020-12-23 00:35:51,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:51,520 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:51,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841866083] [2020-12-23 00:35:51,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254149475] [2020-12-23 00:35:51,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:51,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 00:35:51,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:35:51,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 00:35:51,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:51,625 INFO L348 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2020-12-23 00:35:51,625 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2020-12-23 00:35:51,626 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:51,633 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:51,634 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:51,634 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:26 [2020-12-23 00:35:51,711 INFO L348 Elim1Store]: treesize reduction 152, result has 13.6 percent of original size [2020-12-23 00:35:51,712 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 48 [2020-12-23 00:35:51,714 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:51,721 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:51,722 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:51,723 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:40 [2020-12-23 00:35:51,834 INFO L348 Elim1Store]: treesize reduction 282, result has 11.3 percent of original size [2020-12-23 00:35:51,835 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 65 [2020-12-23 00:35:51,838 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:51,850 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:51,856 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:51,856 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:54 [2020-12-23 00:35:51,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:52,050 INFO L348 Elim1Store]: treesize reduction 430, result has 10.0 percent of original size [2020-12-23 00:35:52,051 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 82 [2020-12-23 00:35:52,053 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:52,073 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:52,074 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:52,074 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:85, output treesize:71 [2020-12-23 00:35:52,818 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:52,821 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 00:35:52,826 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 00:35:52,829 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-23 00:35:52,880 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:52,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:52,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 29 [2020-12-23 00:35:52,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21299227] [2020-12-23 00:35:52,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 00:35:52,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:52,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 00:35:52,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2020-12-23 00:35:52,883 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 29 states. [2020-12-23 00:35:53,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:53,793 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2020-12-23 00:35:53,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 00:35:53,793 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-12-23 00:35:53,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:53,794 INFO L225 Difference]: With dead ends: 42 [2020-12-23 00:35:53,794 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 00:35:53,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=436, Invalid=1286, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 00:35:53,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 00:35:53,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-12-23 00:35:53,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 00:35:53,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-12-23 00:35:53,804 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2020-12-23 00:35:53,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:53,804 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-12-23 00:35:53,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 00:35:53,805 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-12-23 00:35:53,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 00:35:53,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:53,806 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:54,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:54,020 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:54,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:54,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1072678489, now seen corresponding path program 7 times [2020-12-23 00:35:54,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:54,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088739071] [2020-12-23 00:35:54,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 33 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:54,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088739071] [2020-12-23 00:35:54,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189953098] [2020-12-23 00:35:54,114 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:54,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:35:54,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 50 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:54,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:54,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-12-23 00:35:54,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62277323] [2020-12-23 00:35:54,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 00:35:54,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:54,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 00:35:54,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=168, Unknown=0, NotChecked=0, Total=272 [2020-12-23 00:35:54,326 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 17 states. [2020-12-23 00:35:54,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:54,449 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-12-23 00:35:54,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 00:35:54,450 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 36 [2020-12-23 00:35:54,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:54,451 INFO L225 Difference]: With dead ends: 68 [2020-12-23 00:35:54,451 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 00:35:54,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:35:54,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 00:35:54,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-12-23 00:35:54,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 00:35:54,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-12-23 00:35:54,460 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-12-23 00:35:54,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:54,460 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-12-23 00:35:54,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 00:35:54,461 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-12-23 00:35:54,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 00:35:54,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:54,462 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:35:54,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 00:35:54,677 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:35:54,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:35:54,678 INFO L82 PathProgramCache]: Analyzing trace with hash 811766135, now seen corresponding path program 8 times [2020-12-23 00:35:54,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:35:54,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19638737] [2020-12-23 00:35:54,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:35:54,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:35:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 5 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:55,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19638737] [2020-12-23 00:35:55,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148978473] [2020-12-23 00:35:55,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:35:55,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:35:55,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:35:55,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 00:35:55,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:35:55,423 INFO L348 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2020-12-23 00:35:55,423 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2020-12-23 00:35:55,426 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:55,431 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:55,432 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:55,433 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:26 [2020-12-23 00:35:55,505 INFO L348 Elim1Store]: treesize reduction 152, result has 13.6 percent of original size [2020-12-23 00:35:55,506 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 48 [2020-12-23 00:35:55,508 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:55,515 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:55,517 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:55,517 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:40 [2020-12-23 00:35:55,622 INFO L348 Elim1Store]: treesize reduction 282, result has 11.3 percent of original size [2020-12-23 00:35:55,622 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 65 [2020-12-23 00:35:55,625 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:55,635 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:55,635 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:55,636 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:54 [2020-12-23 00:35:55,822 INFO L348 Elim1Store]: treesize reduction 430, result has 10.0 percent of original size [2020-12-23 00:35:55,823 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 82 [2020-12-23 00:35:55,827 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:55,842 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:55,843 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:55,843 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:82, output treesize:68 [2020-12-23 00:35:55,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:35:56,094 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 31 [2020-12-23 00:35:56,095 INFO L348 Elim1Store]: treesize reduction 596, result has 9.1 percent of original size [2020-12-23 00:35:56,096 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 96 treesize of output 99 [2020-12-23 00:35:56,099 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:35:56,121 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:35:56,122 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:35:56,123 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:99, output treesize:85 [2020-12-23 00:35:57,044 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:35:57,047 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-23 00:35:57,052 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-23 00:35:57,055 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-23 00:35:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 21 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:35:57,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:35:57,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2020-12-23 00:35:57,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021001551] [2020-12-23 00:35:57,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 00:35:57,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:35:57,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 00:35:57,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:35:57,124 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 37 states. [2020-12-23 00:35:58,237 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2020-12-23 00:35:59,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:35:59,789 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2020-12-23 00:35:59,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 00:35:59,790 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 38 [2020-12-23 00:35:59,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:35:59,791 INFO L225 Difference]: With dead ends: 48 [2020-12-23 00:35:59,791 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 00:35:59,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=654, Invalid=2652, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 00:35:59,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 00:35:59,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-12-23 00:35:59,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 00:35:59,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-12-23 00:35:59,803 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2020-12-23 00:35:59,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:35:59,804 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-12-23 00:35:59,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 00:35:59,804 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-12-23 00:35:59,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 00:35:59,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:35:59,805 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:36:00,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 00:36:00,018 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:36:00,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:36:00,019 INFO L82 PathProgramCache]: Analyzing trace with hash 975163949, now seen corresponding path program 9 times [2020-12-23 00:36:00,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:36:00,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213876157] [2020-12-23 00:36:00,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:36:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:36:00,126 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 51 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:36:00,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213876157] [2020-12-23 00:36:00,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388419747] [2020-12-23 00:36:00,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:36:00,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 00:36:00,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:36:00,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 00:36:00,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:36:00,432 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 72 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:36:00,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:36:00,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-12-23 00:36:00,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023552356] [2020-12-23 00:36:00,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 00:36:00,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:36:00,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 00:36:00,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=212, Unknown=0, NotChecked=0, Total=342 [2020-12-23 00:36:00,436 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 19 states. [2020-12-23 00:36:00,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:36:00,592 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-12-23 00:36:00,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 00:36:00,593 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-12-23 00:36:00,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:36:00,596 INFO L225 Difference]: With dead ends: 78 [2020-12-23 00:36:00,596 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 00:36:00,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-12-23 00:36:00,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 00:36:00,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-12-23 00:36:00,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 00:36:00,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-12-23 00:36:00,611 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-12-23 00:36:00,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:36:00,611 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-12-23 00:36:00,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 00:36:00,612 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-12-23 00:36:00,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 00:36:00,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:36:00,613 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:36:00,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:36:00,826 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:36:00,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:36:00,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1359564491, now seen corresponding path program 10 times [2020-12-23 00:36:00,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:36:00,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906984342] [2020-12-23 00:36:00,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:36:00,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:36:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 6 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:36:01,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906984342] [2020-12-23 00:36:01,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910493338] [2020-12-23 00:36:01,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:36:01,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:36:01,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:36:01,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 00:36:01,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:36:01,428 INFO L348 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2020-12-23 00:36:01,429 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2020-12-23 00:36:01,430 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:01,436 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:01,437 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:01,437 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:26 [2020-12-23 00:36:01,537 INFO L348 Elim1Store]: treesize reduction 152, result has 13.6 percent of original size [2020-12-23 00:36:01,537 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 48 [2020-12-23 00:36:01,539 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:01,548 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:01,549 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:01,550 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:40 [2020-12-23 00:36:01,694 INFO L348 Elim1Store]: treesize reduction 282, result has 11.3 percent of original size [2020-12-23 00:36:01,695 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 65 [2020-12-23 00:36:01,697 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:01,708 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:01,709 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:01,709 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:68, output treesize:54 [2020-12-23 00:36:01,900 INFO L348 Elim1Store]: treesize reduction 430, result has 10.0 percent of original size [2020-12-23 00:36:01,900 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 82 [2020-12-23 00:36:01,903 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:01,918 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:01,919 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:01,919 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:82, output treesize:68 [2020-12-23 00:36:02,179 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 31 [2020-12-23 00:36:02,180 INFO L348 Elim1Store]: treesize reduction 596, result has 9.1 percent of original size [2020-12-23 00:36:02,180 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 96 treesize of output 99 [2020-12-23 00:36:02,183 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:02,202 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:02,203 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:02,204 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:96, output treesize:82 [2020-12-23 00:36:02,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:36:02,575 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 36 [2020-12-23 00:36:02,576 INFO L348 Elim1Store]: treesize reduction 780, result has 8.5 percent of original size [2020-12-23 00:36:02,577 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 110 treesize of output 116 [2020-12-23 00:36:02,582 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:02,609 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:02,610 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:02,611 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:113, output treesize:99 [2020-12-23 00:36:03,903 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 00:36:03,905 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-23 00:36:03,909 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2020-12-23 00:36:03,912 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 10 disjuncts [2020-12-23 00:36:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 31 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:36:04,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:36:04,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24] total 37 [2020-12-23 00:36:04,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089479063] [2020-12-23 00:36:04,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 00:36:04,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:36:04,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 00:36:04,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1019, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 00:36:04,004 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 37 states. [2020-12-23 00:36:05,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:36:05,816 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2020-12-23 00:36:05,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 00:36:05,816 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2020-12-23 00:36:05,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:36:05,817 INFO L225 Difference]: With dead ends: 54 [2020-12-23 00:36:05,817 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 00:36:05,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=678, Invalid=2184, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 00:36:05,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 00:36:05,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2020-12-23 00:36:05,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 00:36:05,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-12-23 00:36:05,831 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2020-12-23 00:36:05,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:36:05,831 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-12-23 00:36:05,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 00:36:05,832 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-12-23 00:36:05,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 00:36:05,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:36:05,833 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:36:06,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:36:06,043 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:36:06,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:36:06,044 INFO L82 PathProgramCache]: Analyzing trace with hash 62899585, now seen corresponding path program 11 times [2020-12-23 00:36:06,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:36:06,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926947574] [2020-12-23 00:36:06,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:36:06,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:36:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 73 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:36:06,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926947574] [2020-12-23 00:36:06,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952514093] [2020-12-23 00:36:06,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:36:06,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-23 00:36:06,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:36:06,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 00:36:06,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:36:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 98 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:36:06,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 00:36:06,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-12-23 00:36:06,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33752688] [2020-12-23 00:36:06,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 00:36:06,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:36:06,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 00:36:06,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:36:06,582 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 21 states. [2020-12-23 00:36:06,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:36:06,770 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-12-23 00:36:06,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:36:06,771 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 48 [2020-12-23 00:36:06,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:36:06,771 INFO L225 Difference]: With dead ends: 88 [2020-12-23 00:36:06,771 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 00:36:06,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2020-12-23 00:36:06,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 00:36:06,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-12-23 00:36:06,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 00:36:06,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-12-23 00:36:06,782 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-12-23 00:36:06,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:36:06,783 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-12-23 00:36:06,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 00:36:06,783 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-12-23 00:36:06,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 00:36:06,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:36:06,784 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:36:06,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 00:36:06,987 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:36:06,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:36:06,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1296772193, now seen corresponding path program 12 times [2020-12-23 00:36:06,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:36:06,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525001700] [2020-12-23 00:36:06,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:36:07,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:36:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 7 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:36:07,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525001700] [2020-12-23 00:36:07,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988418646] [2020-12-23 00:36:07,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:36:07,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-23 00:36:07,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:36:07,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 00:36:07,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:36:07,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:36:07,827 INFO L348 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2020-12-23 00:36:07,828 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2020-12-23 00:36:07,828 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:07,836 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 00:36:07,837 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 00:36:07,837 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:31 [2020-12-23 00:36:07,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:36:08,054 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2020-12-23 00:36:08,054 INFO L348 Elim1Store]: treesize reduction 132, result has 51.6 percent of original size [2020-12-23 00:36:08,055 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 163 [2020-12-23 00:36:08,058 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:08,117 INFO L625 ElimStorePlain]: treesize reduction 81, result has 43.0 percent of original size [2020-12-23 00:36:08,119 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 00:36:08,119 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:61, output treesize:61 [2020-12-23 00:36:08,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:36:08,635 WARN L197 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 74 [2020-12-23 00:36:08,636 INFO L348 Elim1Store]: treesize reduction 224, result has 60.1 percent of original size [2020-12-23 00:36:08,637 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 76 treesize of output 368 [2020-12-23 00:36:08,644 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:08,774 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2020-12-23 00:36:08,775 INFO L625 ElimStorePlain]: treesize reduction 206, result has 30.6 percent of original size [2020-12-23 00:36:08,777 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 00:36:08,778 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:91, output treesize:91 [2020-12-23 00:36:09,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:36:09,797 WARN L197 SmtUtils]: Spent 787.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 128 [2020-12-23 00:36:09,802 INFO L348 Elim1Store]: treesize reduction 316, result has 65.6 percent of original size [2020-12-23 00:36:09,808 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 22 case distinctions, treesize of input 101 treesize of output 641 [2020-12-23 00:36:09,818 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:10,058 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 50 [2020-12-23 00:36:10,059 INFO L625 ElimStorePlain]: treesize reduction 375, result has 24.4 percent of original size [2020-12-23 00:36:10,063 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 00:36:10,063 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:121, output treesize:121 [2020-12-23 00:36:10,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:36:11,863 WARN L197 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 243 DAG size of output: 198 [2020-12-23 00:36:11,864 INFO L348 Elim1Store]: treesize reduction 408, result has 69.6 percent of original size [2020-12-23 00:36:11,865 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 37 case distinctions, treesize of input 126 treesize of output 982 [2020-12-23 00:36:11,887 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:12,282 WARN L197 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 60 [2020-12-23 00:36:12,284 INFO L625 ElimStorePlain]: treesize reduction 588, result has 20.4 percent of original size [2020-12-23 00:36:12,290 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-23 00:36:12,290 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:151, output treesize:151 [2020-12-23 00:36:13,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:36:16,306 WARN L197 SmtUtils]: Spent 2.91 s on a formula simplification. DAG size of input: 339 DAG size of output: 284 [2020-12-23 00:36:16,308 INFO L348 Elim1Store]: treesize reduction 500, result has 72.8 percent of original size [2020-12-23 00:36:16,309 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 56 case distinctions, treesize of input 151 treesize of output 1391 [2020-12-23 00:36:16,342 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:16,955 WARN L197 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 70 [2020-12-23 00:36:16,956 INFO L625 ElimStorePlain]: treesize reduction 845, result has 17.6 percent of original size [2020-12-23 00:36:16,961 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-12-23 00:36:16,962 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:181, output treesize:181 [2020-12-23 00:36:28,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 00:36:33,545 WARN L197 SmtUtils]: Spent 5.16 s on a formula simplification. DAG size of input: 451 DAG size of output: 386 [2020-12-23 00:36:33,546 INFO L348 Elim1Store]: treesize reduction 592, result has 75.3 percent of original size [2020-12-23 00:36:33,547 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 1 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 79 case distinctions, treesize of input 176 treesize of output 1868 [2020-12-23 00:36:33,589 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 00:36:34,531 WARN L197 SmtUtils]: Spent 941.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 80 [2020-12-23 00:36:34,532 INFO L625 ElimStorePlain]: treesize reduction 1146, result has 15.5 percent of original size [2020-12-23 00:36:34,539 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2020-12-23 00:36:34,539 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:211, output treesize:211 [2020-12-23 00:37:46,797 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 82